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20121201
20121231
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over the perfectly flat marina green, at the whole marine area, which is also perfectly flat because it was artificial filled from the 1915 exposition. >> that is correct. it was hydraulics and pumped in from the bay. same principle, they built a dike on the outside it, and then pumped in the sand. and as we all know, in 1989, a lot of damage. lawrence can speak to the concept of soft story problems with the buildings, and the look of viable soil. in perfect concert with each other, you get major damage, sometimes collapsed. that is the subject of -- i guess we did a video of that about a year ago? >> would try to pick up all the hazards. >> this is recreation of the natural landscape? >> yes, but the four points set on a rock. there is a natural rock outcrop their. the natural material was reclaimed land, because it was the original airport for san francisco. it was about 4,000 feet long. in those days, they had small propeller planes and it was adequate. the bridge itself is supported on case sounds that go to rock. -- is supported on casings that go to rock. it is predominantly sa
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